/Engine/Source/Runtime/CoreUObject/Public/Serialization/FindReferencersArchive.h
GetReferenceCounts without empyting out map
int32 AppendReferenceCounts ( [TMap](API\Runtime\Core\Containers\TMap)< class [UObject](API\Runtime\CoreUObject\UObject\UObject) *, int32 > & out_ReferenceCounts ) const